projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 08f43f9b | 1 | /* memcmp - compare two memory blocks. 32 bit S/390 version. |
| b168057a | 2 | Copyright (C) 2012-2015 Free Software Foundation, Inc. |
| 08f43f9b AK |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 19 | ||
| 20 | #include "sysdep.h" | |
| 21 | #include "asm-syntax.h" | |
| 22 | ||
| 23 | /* INPUT PARAMETERS | |
| 24 | %r2 = address of first memory area | |
| 25 | %r3 = address of second memory area | |
| 26 | %r4 = number of bytes to compare. */ | |
| 27 | ||
| 28 | .text | |
| 29 | #ifdef USE_MULTIARCH | |
| 30 | ENTRY(memcmp_g5) | |
| 31 | #else | |
| 32 | ENTRY(memcmp) | |
| 33 | #endif | |
| 34 | .machine "g5" | |
| 35 | basr %r5,0 | |
| 36 | .L_G5_16: | |
| 37 | ltr %r4,%r4 | |
| 38 | je .L_G5_4 | |
| 39 | ahi %r4,-1 | |
| 40 | lr %r1,%r4 | |
| 41 | srl %r1,8 | |
| 42 | ltr %r1,%r1 | |
| 43 | jne .L_G5_12 | |
| 44 | ex %r4,.L_G5_17-.L_G5_16(%r5) | |
| 45 | .L_G5_4: | |
| 46 | ipm %r2 | |
| 47 | sll %r2,2 | |
| 48 | sra %r2,30 | |
| 49 | br %r14 | |
| 50 | .L_G5_12: | |
| 51 | clc 0(256,%r3),0(%r2) | |
| 52 | jne .L_G5_4 | |
| 53 | la %r3,256(%r3) | |
| 54 | la %r2,256(%r2) | |
| 55 | brct %r1,.L_G5_12 | |
| 56 | ex %r4,.L_G5_17-.L_G5_16(%r5) | |
| 57 | j .L_G5_4 | |
| 58 | .L_G5_17: | |
| 59 | clc 0(1,%r3),0(%r2) | |
| 60 | #ifdef USE_MULTIARCH | |
| 61 | END(memcmp_g5) | |
| 62 | #else | |
| 63 | END(memcmp) | |
| 64 | libc_hidden_builtin_def (memcmp) | |
| 65 | weak_alias(memcmp, bcmp) | |
| 66 | #endif |